Perhaps you should try some spelling variations:
"heir apparent" » "huir apparent", "her apparent", "hair apparent", "heir apparently", "heir aparente", "heir parent"
"weir apparent" » "weir apparently", "weir aparente", "weir parent", "wei apparent", "weil apparent"
"weis apparent" » "weis apparently", "weis aparente", "weis parent"
"weir parently" » "wei parently", "weil parently", "weir apparently", "weir parental", "weir parent"

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("heir apparent") OR ((((("weir apparent") OR ("weis apparent"))) OR ("weir parently"))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"heir apparent\") OR (((((\"weir apparent\") OR (\"weis apparent\"))) OR (\"weir parently\"))))".
• Removing quotes may allow a broader search: (( heir apparent ) OR ((((( weir apparent ) OR ( weis apparent ))) OR ( weir parently )))).
• Adding a wildcard symbol may retrieve word variants: (("heir apparent") OR ((((("weir apparent") OR ("weis apparent"))) OR ("weir parently"))))*.